Oscillating hydraulic motor.



W. H. WOODWARD.

OSCiLLATING HYDRAULIC MOTOR.

APPLICATION FILED OCT. 4. I915.

Patented Oct.10,1916.

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w. H. WOODWARD. OSCILLATING HYDRAULIC MOTOR.

APPLICATION FILED OCT. 4, 19l5.

1,200,681 Patented Oct. 10,1916.

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W. H. WOODWARD.

OSCILLATING HYDRAULIC MOTOR APPLICATION FILED 0CT.4, 1915.

1,200,681 Patented Oct. 10, 1916.

3 SHEETS-SHEET 3. 5

M42772 fire/72hr Wwa/LMM:

OSCILLATING HYDRAULIC MOTOR.

Specification of Letters Patent.

Patented Oct. 10, 1916.

Application filed October 4, 1915. Serial No. 54,905.

To all whom it may concern:

Be it known that I, WILLIAM H. 001)- WARD, citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Oscillating Hydraulic Motors, of which the following is a specification.

This invention relates to improvements in oscillating hydraulic motors and has for its object to provide a motor of the said type, for a broad range of domestic uses, such for example as driving a washing machine.

In order to best meet the requirements of such purposes, it is necessary that the motor be void of springs and gears and contain comparatively few parts, arranged so as to cheapen the construction of the motor, while greatly adding to its efficiency. The said objects are accomplished by providing a motor of the above type with only two moving parts, namely a prime mover or piston, and a valve so arranged as to allow the full head of water pressure to bear against the face of the piston the full length of its stroke in either direction, making it possible for the motor to run on very low pressure.

A further object of my invention is to provide a motor with a single valve, and thereby dispense with the auxiliary valve usually used with slide valves, and to operate said valve by an auxiliary arrangement in said valve and forming part of same.

A further object of my invention is to provide a motor with a valve which cannot stop on its center position,-a valve with two main ports instead of the usual three.

A further object is to provide a valve which will allow the motor to start with the working parts in any position, and which offers no resistance to the piston at the end of the stroke of said piston, thus enabling the motor to run with or without a load, which insures its operation on either very high or very low pressure, and insures its operation when in use in unskilled hands.

My invention'further consists in certain novel details, which will be first fully described, and afterward specifically pointed out in the appended claims.

In the accompanying drawings-Figure 1 is a horizontal plan view of the motor with the cover removed and parts assembled for operation. Fig. 2 is a view similar to Fig.

1, showing the working parts in their opposite position. Fig. 3 is an elevation of the assembled motor, with the outer wall of the cylinder broken at line 22 of Fig. 1. Fig. A is a sectional elevation similar to Fig. 3, showing the working parts in their opposite position. Fig. is a vertical sectional view, taken through the center of the motor, on line 11 of Fig. 1, showing the valve oscillated half the length of its stroke, and showing the piston half the length of its stroke. Fig. 6 is a vertical sectional view similar to Fig. 5, taken on line 7-7 of F ig. 2, showing the working parts in their opposite position. Fig. 7 is a perspective view of the valve removed from its casing. Fig. 8 is a top plan view of the valve casing removed from its support. Fig. 9 is an elevation of the valve casing re- .-moved from its support, showing the side which is next to the wall of the motor. Fig. 10 is an elevation of the valve casing removed from its support, showing the opposite or inner side thereof. Fig. 11 is a bottom plan of the valve casing removed from its support, showing exhaust openings in the lower end of said valve casing.

Referring specifically to the drawings, 3 indicates a cylindrical casing in which is a shaft 7, its hub 8, and a wing piston 9 rigid with the shaft. The inlet hose connection or nipple 21 enters the side wall of the cylinder at the middle thereof, into a cross passage or recess 23 formed in the cylinder wall. The outlet hose connection or nipple 20 opens from a cross passage or recess 20 in the bottom of the cylinder. The shaft extends through a gland 6 in the bottom of the cylinder and will. be connected to the machine to be driven.

The cylinder contains a valve casing 11 which fills the space between one side wall of the cylinder and the hub 8, with packing 10 at the joint, and the casing is opposite sides with arms 30 and 30, for oscillating the valve 14;' also the stops 12 which strike the valve casing to limit the stroke of the piston.

The valve casing has a circular or cylindrical chamber therein to receive the valve lt, and various ports or passages now to be described. At the middle it has an inlet chamber 28 which matches with the chamber 23, and forms the inlet passage. This communicates with the valve through main inlet ports 28 (Fig. 9) located at opposite ends of the passa e. It also has an auxiliary inlet port 29, for the purpose to be described. In the upper and lower ends the casing has, respectively, opposite main exhaust ports 27 and 28 which communicate with each other by a recess or space 60 in the casin and which open through recesses 19 and 19 at the bottom into the opposite ends of the cross passage 20 leading to the outlet. Small auxiliary intermediate ports 29 and 29 also communicate with the exhaust space, for a purpose to be described. It will be seen, therefore, that the ports 29 and 28 are inlet ports, and the others are outlet ports.

On the inner side of the valve casing, that is the side toward the piston chamber, shown in Fig. 10, the valve casing has at one side a port or opening 32, and at the other side a port or opening 32. By operation of the valve the pressure is let in through the ports 28 to one port 32, and out through the other port 82' to the outlet ports 27 and 28.

The valve 14 has an oscillating action produced by the piston and its arms 30 and 30, and also has a reciprocating action caused by the fluid pressure. That is, it oscillates and also moves up and down. It consists of a barrel or plug having two heads 61 at opposite ends and a middle wall or partition 62 with transverse passages 34 and 34 extending through the same between said heads and partition. The heads are cupped or dished to form top and bottom spaces 33 and 83. The parts are connected by webs 16 and 16 at one side, and at the opposite side by a solid part which has grooves 24 and 24 extending oppositely from the middle of the valve, where the oil-set parts of the grooves lap, to the cups or recesses at the opposite ends of the valve. These grooves cooperate with the inlet port 29 and the outlet ports 29 and 29 in the diflerent positions of the valve, and admit and exhaust the motive fluid which serves to move the valve up and down.

In operation, starting from the position shown in Fig. 1, the valve 1 1 is in the raised position, as shown in Fig. 5, and the fluid enters through the ports 28 and passes through passage 34: and port 32 and swings the piston to the right until it strikes and turns the valve to the position shown in Fig. 2, at which time pressure enters through ports 29 and groove 2% to the upper chamber 33, and exhausts from the lower chamber 33 through the groove 24 and port 29", and the valve drops, and the motive fluid then enters through the main ports 2k chamber 34. and port 32 to the opposite side of the piston and exhausts through the ports 32 and 28 from the other side. W hen the piston again turns back and reverses the valve pressure enters through the port 29 and the passage 21 to the chamber 33, and exhausts from the chamber 33 through the groove 24- and the port 29, thereby lifting the valve and permitting the operation to be repeated.

The drawings show two screws 15. These may be omitted while the motor is in operation, as they are merely to hold the valve against turning out of position during transportation, although when in position they will serve to prevent overthrow of the valve incident tothe impact of the piston arms.

It will be seen that the valve comprises but a single part in its casing, and the use of a separate controlling valve is not required. This result follows from the combined oscillating and reciprocating movement of the valve.

Having described my invention what I claim is:

1. In a motor, the combination with a casing and an oscillating piston therein, an oscillating and reciprocating valve controlling the inlet and exhaust of fluid pressure to and from opposite sides of the piston, means carried by the piston to oscillate the valve, and means controlled by the oscillation of the valve to permit the fluid pressure to reciprocate the same.

2. In a motor, the combination with a casing and an oscillating piston therein, of an oscillating and reciprocating valve controlling the inlet and exhaust of fluid pressure to and from opposite sides of the piston, a valve casing forming pressure chambers at opposite ends of said valve, means carried by the piston to oscillate the valve, and means automatically controlled by the valve to admit fluid pressure to and exhaust the same from said chambers respectively, whereby the valve is reciprocated.

3. In a motor, the combination with a casing and an oscillating piston therein, of an oscillating and reciprocating valve controlling the inlet and exhaust of fluid pressure to and from opposite sides of the piston, a valve casing forming pressure chambers at opposite ends of said valve, said valve and said auxiliary ports, whereby the valve is reciprocated by the fluid pressure to govern the flow through the main ports.

4. In a motor, the combination with a casing and an oscillating piston therein, of a reciprocating and oscillating valve controlling the inlet and exhaust of fluid pressure from opposite sides of the piston, and means carried by the piston to oscillate the valve, said valve having ports controlled by the oscillation thereof to govern its reciprocation by the fluid pressure, and ports controlled by the reciprocation thereof to govern the operation of the fluid pressure on the piston.

5. In a motor, the combination with a cylinder and an oscillating piston therein, of a valve casing having openings to opposite sides of the piston and also inlet and exhaust ports, and an oscillating and reciprocating valve in the casing, said valve having passages adapted to connect said openings and ports as the valve is reoiprocated, and also having longitudinal grooves communicating with chambers at opposite ends of the valve and with inlet and exhaust ports in the casing, whereby the valve may be reciprocated by fluid pressure, and means carried by the piston to oscillate the valve and control the flow to and from said chambers.

6. In a motor, the combination with a cylinder, and an oscillating piston therein, of a valve casing in the cylinder having openings to opposite sides of the piston, and also having main and auxiliary exhaust ports near the ends thereof and intermediate main and auxiliary inlet ports, an oscillating and reciprocating valve in the casing having cross passages with a middle partition therebetween, adapted to alternately connect the main inlet and exhaust ports with said openings respectively, and also having chambers at the ends and offset passages connecting said chambers alternately with the auxiliary inlet and exhaust ports as the valve is oscillated, and means carried by the piston to oscillate said valve.

In testimony whereof, I affix my signature in presence of two witnesses.

WILLIAM H. VVOODWVARD.

Witnesses:

JOHN A. BOMMHARDT, F. M. TAGGETT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

